Generalized Markoff Maps and McShane's Identity

Details Generalized Markoff Maps and McShane's Identity Generalized Markoff Maps and McShane's Identity

2005-02-22

arxiv.org/abs/math/0502464v1

Advances in Mathematics 217:2 (2008) 761-813

Mathematics

Geometric Topology

49 pages, 9 figures

Scientific paper

10.1016/j.aim.2007.09.004

We study general representations of the free group on two generators into $SL(2,C)$, and the connection with generalized Markoff maps, following Bowditch. We show that Bowditch's Q-conditions for generalized Markoff maps are sufficient for the generalized McShane identity to hold for the corresponding representations and that the subset of representations satisfying these conditions is the largest open subset in the relative character variety on which the mapping class group acts properly discontinuously. Moreover we generalize Bowditch's results on variations of McShane's identity for complete, finite volume hyperbolic 3-manifolds which fiber over the circle, with the fiber a punctured-torus, to identities for incomplete hyperbolic structures on such manifolds, hence obtaining identities for closed hyperbolic 3-manifolds which are obtained by doing hyperbolic Dehn surgery on such manifolds.

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